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Preparation method of efficient and stable bifunctional catalyst and application of efficient and stable bifunctional catalyst

A bifunctional catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems that bifunctional catalyst research is rarely reported.

Active Publication Date: 2019-06-28
WUHAN HYNERTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on bifunctional catalysts for electrocatalytic hydrogen evolution and oxygen reduction reactions.

Method used

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  • Preparation method of efficient and stable bifunctional catalyst and application of efficient and stable bifunctional catalyst
  • Preparation method of efficient and stable bifunctional catalyst and application of efficient and stable bifunctional catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh 30g of manganese nitrate and 10g of nickel nitrate, then stir and mix with 40g of polyethylene glycol, stir at 60°C for 48h; after stirring, add dropwise dilute nitric acid with a mass ratio of 10% to adjust the pH of the solution to 2;

[0023] (2) Put the mixed solution into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 200°C for 48 hours;

[0024] (3) After the hydrothermal reaction is completed, suction filter and wash the reactant with ultrapure water and ethanol to neutrality, and fully dry at 60°C;

[0025] (4) calcining the dry matter at high temperature for 2 hours to obtain a double metal oxide product;

[0026] (5) The product is loaded into a high-temperature and high-pressure reactor, 150° C., 3 MPa hydrogen pressure, and heated for 2 hours to obtain H 0.3 mn 0.66 Ni 0.34 o 3 .

[0027] (6) 10g H 0.3 mn 0.66 Ni 0.34 o 3 Disperse into 50mL of ethylene glycol / water solution, add dropwise 1.1mL of chloroplatinic acid...

Embodiment 2

[0029] (1) Weigh 10g of manganese nitrate, 6.6g of nickel nitrate and 12.7g of chromium nitrate, then stir and mix with polyethylene glycol, and stir at 60°C for 48h; after stirring, add dropwise dilute nitric acid with a mass ratio of 10% to adjust the pH of the solution to 2;

[0030] (2) Put the mixed solution into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 200°C for 48 hours;

[0031] (3) After the hydrothermal reaction is completed, suction filter and wash the reactant with ultrapure water and ethanol to neutrality, and fully dry at 60°C;

[0032] (4) calcining the dry matter at high temperature for 2 hours to obtain a trimetallic oxide product;

[0033] (5) The product is loaded into a high-temperature and high-pressure reactor, 150° C., 3 MPa hydrogen pressure, and heated for 4 hours to obtain H 0.5 mn 0.2 Ni 0.2 Cr 0.6 o 3 .

[0034] (6) 10g H 0.5 mn 0.2 Ni 0.2 Cr 0.6 o 3 Disperse into 50mL of ethylene glycol / water solution, add 0...

Embodiment 3

[0036] 1. Pt / H 0.3 mn 0.66 Ni 0.34 o 3 The preparation method of catalyst solution

[0037] Weigh 2.0mg Pt / H 0.3 mn 0.66 Ni 0.34 o 3 The catalyst (hereinafter referred to as the catalyst) was dispersed in 1 mL of absolute ethanol, and 11.2 μL of 5.0 wt % Nafion solution was added, and the catalyst was sonicated for 1 h to disperse the catalyst evenly.

[0038] 2. Electrode spraying method

[0039] Fix the treated glassy carbon electrode, and evenly drop the ultrasonic catalyst solution onto the glassy carbon electrode, so that it is evenly distributed in the effective area of ​​the glassy carbon electrode, and dry the prepared glassy carbon electrode naturally to Awaiting follow-up testing.

[0040] 3. Activation of the catalyst

[0041] Using a three-electrode system, the working electrode is a prepared carbon paper electrode; the counter electrode is a carbon rod; the reference electrode is a saturated calomel electrode; the electrolyte is 0.5mol / L H 2 SO 4 solut...

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Abstract

The present invention discloses a preparation method of a binary and ternary transition metal hydride catalyst and application of the binary and ternary transition metal hydride catalyst in an electro-catalysis hydrogen evolution and a fuel cell. The molecular formula of the catalyst is Pt / HxMaRbYcO3, wherein M, R, Y are three different types of transition metal, x is 0.01-1, 0<=a<1, 0<=b<1, 0<=c<1, a+b+c=1, and the mass content of the Pt in the catalyst is 0.01-20%. The Pt / HxMaRbYcO3 is taken as an electrolytic water catalyst, has the electrochemical performance in an acid electrolyte being equivalent to the commercialized carbon-supported platinum catalytic performance, has very high stability, and is simple in manufacturing process and easy to amplify so that the Pt / HxMaRbYcO3 can be taken as a substitute of the carbon-supported platinum catalyst to effectively reduce the hydrogen production cost. The bifunctional catalyst with electro-catalysis hydrogen evolution and oxygen reduction reaction has never been reported.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a method for preparing binary and ternary transition metal hydrides and their application in electrocatalytic hydrogen evolution and fuel cells. Background technique [0002] Hydrogen energy is the most ideal green energy in the 21st century, with the characteristics of cleanness, high efficiency and high quality. At present, there are three main technologies for the preparation of hydrogen energy, namely hydrogen production from fossil fuels, hydrogen production from water splitting and hydrogen production from biomass raw materials. Among them, the technology of hydrogen production by electrolysis of water has become the research focus of countries all over the world because of its technical characteristics of simple process, no pollution, high product purity and strong applicability. Using renewable energy water as the most basic raw material for hydrogen production by electrolysis o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/92B01J23/89
CPCY02E60/50
Inventor 程寒松杨泽惠
Owner WUHAN HYNERTECH CO LTD
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